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(No Model.)

' G. W. KATTELL.

. POTATO BIGGER.

No, 299,399 Patented May 2'7, 1884.

WITNESSES: INVENTOR I, i E I JMMM/e 'W. lK-wckm. JAWM{ g 7w Mm AATTORNEYS N. PETERS Pholoiikhcgmphcr Wasllingtom D. C,

lUniTnn BTaTns PATENT @rricn.

CHARLES W KATTELL, OF NEW YORK, Y.

POTATO -DIGGER.

SPECIFICATION forming part of Letters Patent No. 299,399, dated May 27,1884.

Application filed January 31, 1884. (X0 model.)

2'0 all whom it may concern:

Be it known that I, Grmrmns W. KAT'IELL, a citizen of the United States,residing at New York, in the county and State of New York, have inventednew and useful Improvements in Potato-Diggers, of which the following isa specification.

My invention relates to the construction and arrangement of the plow,the separatingscreen, andthe supporting-frame of potato diggers, thewhole being hereinafter fully described, and illustrated in theaccompanying drawings, in which- Figure 1 is a longitudinal section of ama chine embodying my invention. Fig. 2 is a plan or top view thereof.Fig. 3 is a crosssection 011 the line 00 m, Fig. 2.

Similar letters indicate similar parts.

The letter A. designates the share of the plow, and B B two arms orstandards supporting the share. These supporting-arms B B are arrangedon the opposite sides of the share, in distinction from the centerthereof, and 0011- sequently the share is left entirely free in thecenter, so that the earth, together with the tubers, weeds, &c., liftedby the plow, may pass freely over the share.

The plowshare A is formed with. a longitudinal central ridge, 0, andwith an upward curve, 1), on both sides, so that the earth, &c., isthrown toward both sides of the share by the ridge, and then thrown backtoward the center by the curvature of the sides, with a tendency toseparate the tubers from the earth. The outline of the share Al'ssubstantially the usual one, and the ridge 0 rises in a curved line fromthe front to the rear edge of the share, as heretofore.

In rear of the plowshare A is located the screen F, for separating thetubers from the earth. This screen is composed of a head, F, and ofteeth F, projecting rearwardly from the head; and in order to insure thepassage of the earth from the share onto the screen, the latter isshaped to correspond approximately to the cross-section of the share, itbeing, moreover, jointed to the share by means of a horizontal pivot, G,in such a manner that in its normal positionthe screen is on a levelwith the rear edge of the share. The screen F is supported on the groundby means of a spurwheel, H, whence it receives a shaking motion, thiswheel being mounted in a stock, I, which is jointed to the screen by avertical pivot, J, so that the wheel may ac commodate itself to theturning of the machine, as at the end of arow. In the example shown, theplow is mounted on a wheeled truck by means of a supporting-frame, K, towhich the share-arms B B are connected, which is jointed to thedraft-poleL at the forward end by means of a horizontal pivot, N, and towhich in turn are jointed two lifting-levers, O, by means of horizontalpivots O, intermediate of the ends of the levers. Said levers 0 rest onthe axle P at one end, and are connected at the opposite end to cranks Qon the ends of a shaft, B, which has its bearings on the draft-pole L,and to which is fixed an arm, S, engaging with a toothed segment, T, inthe manner of a pawl, for holding it, together with the crank-shaft andsupporting'frame, in the desired position. By adjusting the pawl-arm Sin a rearward direction, the crank-shaft R is turned, to lift theforward ends of the levers 0, when the latter act on theshare-supporting frame K to raise it off from the axle P, andconsequently the supportingframe, together with the plowshare, may beset to any desired horizontal plane by a proper adjustment of the arm.The axle I, which, together with the draft-pole L- and wheels U,constitutes the truck, is bent upward at right angles at points justwithin the sides of the share-supporting frame K, as at V V, for thepurpose of increasing the area of clear space beneath the axle, and alsoto guide the supporting-frame in its up and down movement. Theplowshare, however, can also be mounted on a plain draftbeam ofwell-known construction.

'What I claim as new, and desire to secure by Letters Patent, is

l. The combination, in a potato-digger, of a wheeled frame, theplowshare A, the supporting-arms B B, the screen composed of the head F,pivoted to the rear of the share and provided with the rearward teeth,F, and the spur-wheel H, j ournaled in a stock, I, swiveled directly tothe pivoted head of the screen by the vertical pivot J, substantially asand for the purpose described.

2. The combination of the share-supporting pole of a wheeled truck, thelifting-levers frame, to serve as a guide for the latter in its verticalmovement, and the levers resting on the axle and jointed to said frame,substan--15 tially as described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

CHAS. w. KAITELL. 1,. s.]

\Vitnesses:

GEORGE E. WESTERFIELD, Gr ms. WAHLERS.

frame, jointed at its forward end to the draftresting on the axle andjointed intermediate of their ends to the said frame, the crank-shafthaving two cranks connected to the liftinglevers, the pawl-arm fixed tothe crank-shaft,

paw1-arm, substantially as described.

3. lhe combination of the share-supporting frame jointed to thedraft-pole and free to be raised from off the axle, the truck-axle bentupward at right angies within the sides of the

